Dürkopp Adler D888 e-con Operating Instructions Manual page 237

Troubleshooting
Operating Instructions D888 e-con - 00.0 - 12/2023
Disturbance Possible causes
Skipped stitch Needle thread and hook
thread have not been
threaded correctly
Needle is blunt or bent
Needle is not inserted cor-
rectly into the needle bar
The needle thickness used
is unsuitable
The reel stand is assem-
bled incorrectly
Thread tension is too tight Check thread tensions
The needle has damaged
the throat plate or the hook
Distance from the hook
to the needle is not set
correctly
Loose stitches Thread tension is not
adjusted to the sewing
material, the sewing mate-
rial thickness or the thread
used.
Needle thread and hook
thread have not been
threaded correctly
Needle Needle thickness is unsuit-
breakage able for the sewing mate-
rial or the thread
Corrective
Check threading path
( p. 25,  p. 38).
Replace the needle
( p. 22).
Insert the needle correctly
into the needle bar
( p. 22).
Use recommended needle
thickness ( p. 237)
Check the assembly of the
reel stand
( p. 40)
Have parts reworked by
qualified specialists
Set the correct distance
( Service Instructions)
Check thread tensions
( p. 40)
Check threading path
( p. 25,  p. 38).
Use recommended needle
thickness ( p. 238)
235